High strength TiB2

Conference · Mon Oct 01 04:00:00 EDT 1990 · Ceramic Engineering and Science Proceedings; (USA)

OSTI ID:6151980

Torizuka, S; Harada, J; Nishio, H

It was described in a previous paper that fully dense TiB2-20 wt pct sintered bodies were fabricated by glass encapsulation HIP, and their three-point bending strength was as high as 1200 MPa. In this material, grain growth occurred during sintering; the grain sizes of TiB2 and ZrO2 in a sintered (HIP'd) body were 4-6 microns and 2-5 microns, respectively, while starting powder sizes of TiB2 and ZrO2 were 2 microns and 0.1 micron, respectively. To minimize this grain growth, 2.5-5 wt pct SiC, whose size was 0.2 micron, was added. As a result, the grain sizes of TiB2 and ZrO2 in a sintered body were 2-4 microns and 1-3 microns, respectively. The three-point bending strength has increased to 1280 MPa. In addition to improving strength, adding SiC improved the sinterability of TiB2-20 wt pct; the sintered body whose density was 98.0 percent of full density was fabricated by vacuum sintering.

• OSTI ID: 6151980
• Report Number(s): CONF-900160--
• Conference Information: Journal Name: Ceramic Engineering and Science Proceedings; (USA) Journal Volume: 11
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
BORIDES
BORON COMPOUNDS
CERAMICS
CORROSION RESISTANCE
CRYSTAL STRUCTURE
FABRICATION
FLEXURAL STRENGTH
GRAIN GROWTH
GRAIN SIZE
MECHANICAL PROPERTIES
MICROSTRUCTURE
SIZE
TITANIUM BORIDES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
WEAR RESISTANCE